Rubber Gas tank liners

[Ol Blue]

I was reading the May issue of Hemmings and noticed an advertisement for Rubber Gas Tank liners. It was advertised as a do-it-yourself with their advice. I don't need one but I've seen some posts wondering how a person could replace the liners on 78-82 gas tanks so I thought I'd post this. Buyer beware of course.
The ad gave these numbers, 800-901-8265 and 562-920-1871.
Ol Blue